The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 1977
Filed:
Sep. 02, 1975
James R Harnish, York, PA (US);
Borg-Warner Corporation, Chicago, IL (US);
Abstract
A reverse cycle heat pump is provided with a heat exchanger which provides refrigerant subcooling with no thermodynamic losses. The heat exchanger is arranged such that it is operative only during the heating cycle to permit optimum charging of the system and allow operation during the cooling cycle with no excess refrigerant in the system accumulator. The heat exchanger is bypassed when the system is converted from heating to cooling operations. Liquid refrigerant will be mixed with oil in the accumulator during the heating cycle, but not the cooling cycle. Then since refrigerant liquid returning with the oil from the accumulator to the compressor should be evaporated to avoid harm to the compressor, heat applied to the suction line, with no thermodynamic loss, vaporizes this refrigerant. During the cooling operation, no liquid refrigerant is returned from the accumulator, so heat added to the suction gas would be undesirable.